ORACLE MIGRATION · DB UPGRADE · SPARC TO X86 · MINIMAL DOWNTIME

Oracle Database Migration India —
Platform Refresh, Upgrade & Re-platforming

Ogma plans and executes Oracle Database migrations in India — version upgrades (11g/12c to 19c/21c), platform re-platforming (SPARC to x86, AIX to Linux), hardware refresh migrations, and Oracle Database consolidation projects. Our certified DBAs deliver migrations with defined RTO/RPO and minimal business disruption.

Get Oracle Migration Assessment
11g to 19c
Version Upgrade Path
SPARC to x86
Cross-Platform Re-platforming
Zero-Downtime
GoldenGate Option
Certified DBAs
Migration-Specialised Team

Oracle Database Migration Services

Every migration method — from in-place upgrade to GoldenGate zero-downtime cutover.

Version Upgrades

Oracle Database 11g, 12c, 18c to 19c or 21c. Ogma uses Oracle's recommended upgrade paths, pre-upgrade advisor (preupgrd.sql), and post-upgrade validation to ensure application compatibility.

Platform Re-platforming

SPARC/Solaris to Intel Xeon/Linux, AIX/IBM Power to Linux, HP-UX to Oracle Linux — Oracle DB re-platforming with Data Pump, RMAN cross-platform restore, or transportable tablespaces.

GoldenGate Zero-Downtime Migration

Oracle GoldenGate replication for near-zero downtime migration — replicate changes from source to target while the new system is being built and tested, then cut over with seconds of downtime.

Data Pump Migration

Oracle Data Pump (expdp/impdp) for full database, schema, or tablespace-level migration. Ogma uses parallel Data Pump jobs with network links for large databases — minimizing migration window.

Database Consolidation

Multiple Oracle Database instances migrated to a consolidated platform (Exadata, ODA, or large x86 server) using pluggable databases (CDB/PDB architecture). Reduces hardware footprint and license count.

Migration Validation

Post-migration validation: row counts, constraint checks, application smoke tests, performance baseline comparison, and a 2-week parallel-run option for critical workloads before decommissioning the source.

Why Ogma for Oracle Migration?

Migration expertise, a structured process, and full project documentation.

Migration-Certified DBAs

Ogma's DBAs are certified on Oracle Database migration methodologies — upgrade scripts, RMAN cross-platform, and GoldenGate replication. Hands-on experience across multiple migration types and database sizes.

Minimal Downtime Approach

Ogma designs each migration to minimize production downtime — using GoldenGate for near-zero cutover where warranted, and Data Pump parallelism to compress downtime windows for smaller databases.

Full Project Documentation

Every migration includes: migration plan, test migration report, pre-upgrade advisor output, post-migration validation checklist, and rollback runbook — complete documentation for your audit trail.

How It Works

Five structured phases from assessment to validated production cutover.

1
Migration Assessment

Ogma runs the pre-upgrade advisor, reviews application compatibility, assesses deprecated features, and defines the migration method, timeline, and RTO/RPO for your specific environment.

2
Test Migration

A full test migration is performed on a non-production clone — validating the migration process, application compatibility, and resolving any issues before the production window.

3
Performance Benchmark

Post test-migration, Ogma runs a workload benchmark on the new platform — comparing key SQL execution plans and response times to establish that performance meets or exceeds the source.

4
Production Cutover

Production migration is executed during a planned maintenance window — with rollback plan documented and Ogma DBAs on-call for the cutover period.

5
Validation

Post-cutover validation: row counts, constraint checks, application smoke tests, performance monitoring for 48 hours, and sign-off before closing the migration project.

Oracle Migration Method Reference

Downtime, size limits, and key considerations per migration approach.

Migration Type Method Downtime DB Size Limit Notes
Version upgrade (same platform) Oracle upgrade scripts 2–8 hours Unlimited Pre-upgrade advisor required
Data Pump export/import expdp/impdp Hours to days Up to ~10 TB practical Best for smaller DBs
Cross-platform (RMAN) RMAN cross-platform restore 4–24 hours Unlimited Endianness change supported
GoldenGate replication Logical replication Minutes (cutover only) Unlimited License required
Transportable Tablespace TTS export/import 1–4 hours Tablespace-level Same endian required
Pluggable DB (CDB/PDB) Full/partial PDB plug 2–6 hours Unlimited Requires 12c+ source and target

Frequently Asked Questions

Oracle Database migration scope, downtime, and method questions answered.

Ogma handles migrations from Oracle 10g, 11gR2, 12cR1/R2, 18c, and 19c to Oracle 19c or 21c. Oracle 19c is the recommended target — it is the Long Term Release with Oracle support until 2027 (extended support).

With Data Pump, downtime is proportional to DB size — a 1 TB database takes approximately 4–8 hours (export + import). With GoldenGate replication, cutover downtime can be reduced to under 5 minutes regardless of DB size, but GoldenGate requires separate licensing.

Yes — Oracle supports RMAN cross-platform restore for endian-format changes (AIX uses big-endian; Linux uses little-endian). Ogma handles the Data Pump export at the schema level for a clean re-platform, or RMAN cross-platform backup/restore for a full database migration.

Not necessarily — Oracle Database is generally backward compatible with applications. However, deprecated features (certain hints, deprecated packages) may cause issues. Ogma runs the pre-upgrade advisor and application compatibility tests before the production migration.

Container Database (CDB) with Pluggable Databases (PDB) is Oracle's multi-tenant architecture introduced in 12c. It allows multiple databases to share a single set of Oracle binaries and reduces memory overhead. Ogma recommends CDB/PDB for consolidation projects but not mandatory for standalone deployments.

A small Oracle DB version upgrade (single instance, under 500 GB) takes 1–2 weeks including assessment and testing. A large GoldenGate-based re-platforming project for a 10 TB database can take 6–8 weeks. Ogma provides project timelines after the initial assessment.

Yes — if you are migrating to Exadata, Ogma handles both the Exadata procurement/deployment and the Oracle Database migration from your existing platform. The two workstreams are coordinated so the Exadata is ready when migration testing begins.

Get Oracle Migration Assessment

Ogma's certified DBAs plan and execute Oracle Database migrations across India — version upgrades, re-platforming, and consolidation with minimal downtime.

Request a Migration Assessment